Oil-feed pump for internal-combustion engines



H. W. SUMNER.

OIL FEED PUMP FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 3.191s.

Patented Apr. 27, 1920.

H. W. SUMNER.

OIL FEED PUMP FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 3, .1918- n llllll I u. H 1 ||IH attouwq UNITEDsTAtrns PATENT OFFICE.

HENRY w. SUMNER, or SEATTLE, WASHINGTON.

OIL-FEED PUMP FOIt INTERNAL-COMBUSTION ENGINES.

Application filed July 3,

good shape. It also comprises an attach ment whereby a visibleindication is promptly given of the occurrence of any obstruction in thepump which tends .to interfere with its operation and delivery of theproper amount of oil.

. The objects. of my invention may be determined by an inspection'of thespecification and the claims thereof. I

The particular features of my invention I which I consider to be new andupon which I desire av patent will be described in the followingspecification and set out in detail in the claims.

In the drawings, I'have shown my inven- -tion in a type of constructionwhich I' now prefer, although aware that many of the details might bechanged without, however, changing the principles employed.

Figure 1 is a side view or elevation'of a pump having my inventionincorporated therein and the means for operating said pump, a portionofthe pump actuating mechanism being shown in section.

Fig. 2 is a longitudinal section through the pump proper, that is, thecylinder with the valve mechanism.

One of the objects sought in producing this pump is a mechanism whereinthe parts which constitute the wearing members, may be made so that theyare easily removable and also easily renewable, and of such character;of construction that their manufacture consists of simple operationswhich ,may be The pump is of that. type known as aplunger pum I Theplunger 1 is a plain cylinder. ThlS enters a casing 2, which casing isbored, said bore being in two sections of different diameters. The lowersection,

Specification of Letters Patent. Patented Apr, 2'7, 1 920.

1918. serial No. 243,215.

20, is a bore of a diameter to fit the plunger 2 1, the other section 21is of a larger diameter. The plunger is intended to fit closely in thesmaller section 20 of the bore, although this fit is hardly intended tobe of such character as to be relied upon solely to prevent escape ofthe oil.

The outer portion, or main body, 10, of the plunger, has securedthereto, an inner end section 12, which latter is the operating memberof the plunger and this is made a close, accurate fit within the casingand inthe sleeve 3 which is placed in the. larger portion of the boreofthe casing. This removable head 12, is made of hardened metal and ofas accurate a fit as it is feasible to make and securefree reciprocativemove-' ment. body 10 of the plunger, so that, when. de-

sired, it may be removed and another head substituted therefor.

A convenient manner of doing this is that illustrated in Fig. 2. Thehead 12 is provided with a T-shaped flange which fits a correspondinggroove formed in the body 10 of the plunger. These'two parts are readilyremoved by relative transverse movement, but are securely lockedtogether and held in alinement while in working position in the pump.

' The sleeve 3 which fits in the inner or bottom end of thelargerportion 21 ofthe bore It is removable and secured to the in the casing,has an external peripheral groove 30, whichis connected with the centralbore of the sleeve through ports 31. The casing 2 is provided with aport or opening, 22, for connection therewith of the oil supply pipe.This is positioned so as to register with the peripheral groove 30-these, the extent ofthis travel beyond the port determining the amountof fuel which is delivered at each stroke. It is seen that the plungerforms its own valve.

Locked above the sleeve 3, within the 09s 'ing, is a valve containingsleeve 4. This sleeve is centrally bored, forming a cylinder for thereception of the valve sleeve 44. At its lower end, this bore is reducedin diameter and forms a discharge }port 41, through which'the oil isforced by t e plunger. Surrounding this, is a valve seat 40.

Just above the valve seat is an exteriorly recessed peripheral groove42; that is, this groove is in the wall'of'the sleeve, and extendsoutward from the bore within which the valve fits.

The valve 44 is a thin shell or cylinder, having its lower .end closedand shaped to accurately fit the valve seat 40. Just above this lowerend or valve head, it has ports 43, which register with the groove 42.The sleeve '4 is held downward-against the adj acent end of the cylindersleeve- 3. in any suitable ,manner. The means illustrated and which Iprefer to use, is a sleeve 5 which has a head 50 engaging the upper, endof the sleeve 4.

The stem of this sleeve 5 is surrounded make a tight joint between thehead 50 and the upper end of'the sleeve4 while the lower end of thesleeve 4 may directly contact with the upper end of the sleeve I prefer,in order to insure a tight joint,

to use a packing ring 52, which is placed between slightly conedsurfaces on the ends of the two sleeves 3 and 4. This ring may be ofcopper or other relatively soft metal. It will thus compress or flow asufficient amount to insure tightness in the joint between thetwosleeves and also a tight joint against the surfaces of the casing. The

' whole device is thus made absolutely secure aga'instleakage. 4 v Thevalve 44 is normally held down upon its seat by a spring 45 which, atits upper end, bears against the lower end of the sleeve 5. sleeve 5 isa pipe 53 which forms the pi )'e for the discharge of the oil. This pipemay be brazed or otherwise securely heldin the sleeve 5 and leakagebetween the pipe and thesleeve thus prevented. At the lower end ofthecasing, I have provided a gland ,or

stuffingbox 13, which may be employed-as an additional means'for'securing against leakage of the oil about the plunger. This may i be ofany usual orsuitable construction.

' The means which I prefer to emplo for operating the plunger is shownin Fig. 1.

er 1, isscrew The lower end of the plun threaded into-a sleeve 6.hissleeve has sliding. and guiding engagement within a bore formed in amember 60 of the frame or of a member which is secured. to the frame.The sleeve has a stem 61, extendmg downward and through a hole formed Iin the cross head or slide block 7, the latter by the frame.

Within the central bore of the being guided in suitable members carriedThe bolt 61 is loose in the block 7 to the extent that relativereciprocation between the two is freely possible. At its lower end thebolt' 61 is provided. with a nut 62 which limits upward movement of thebolt relative to the slidingblock 7. l

At the upper end of the block- 7 is a washer 70, which is provided, onits upper surface, with suitable seats for two coiled springs 71 and 72.The outer spring 71, at its upper end, bears against a member of theframe or a member which is fixedl secured upon the frame. The function 0this spring is to secure the downward or return movement of the block?and also of the pump plunger which is connected therewith. Forconvenience in adjusting the initial tension placed upon this s ring, Ihave provided a threaded sleeve 3, which acts as the direct support forthe washer 70. This sleeve 73 isthreaded into a member carried by theframe so that it may be adjusted vertically, thereby making it possibleto vary the initial tension of the spring 71.

The inner spring 72, acts in compression between the washer 7O and'thehead 6 and constitutes the member through which the effort required toactuate the plunger under normal conditions without being com: pressed,and yet be capable of giving, in case any obstruction enters the pump,is lessened thereby preventing a possibility of over straining orbreaking the pump or its operating parts. In case of obstruction of thissort, the extent of stroke of the pump plunger will be reduced. In orderto give visible warning 'of this, I have provided what I call atelltale, the same consisting of a small wire or rod 8, which is securedat one end to washer and therefore has a movement which correspondsexactly with that of the reciprocating head, '7. At its upper end itstip is [placed adjacent. to and in exact relation with some part of theplunger ,or a part connected to or moving .in correspondence therewith.As shown, ,it is in exact registry with the shoulder of the head 6. If,during theoperation of the pump, relative movement. between thistell-tale finger and the cam roller ortappet 94, which is engaged by acam 95 carriedby a rotating shaft96,

the latter being turned in any suitable man-' nerfrom the engine shaft.The means employed for reciprocating the head 7 are, however, no part ofthis present invention. Any suitable means for reciprocating the samemay be employed.

It is believed that the operation of the device is evident from theabove description and drawings. The oil supply flows freely to thegroove in the pump and the plunger acts after the mannerv of an ordinaryplunger to force the oil through the ports 41, 42, and 43, and thencethrough delivery pipe In order to clean the pump, it is only necessaryto remove the nut 51 and it is then possible to take out all the sleevescontained within the casing, clean them, replace them or insertsubstitutes. It thus possible to quickly correct any operating troublein the pump. All the parts of this pump are of such character that theymay be cheaply and accurately made and parts may be kept on hand forreplacing those which may not be giving satisfaction.

\Vhat I claim asmy invention is: 1. In an 011 feed pump Forlnternal'combustion engines, a plunger body and a plunger head of likediameter, said head being removablysecured to the.body, and a cylindercasing having a bore in which the plunger is reciprocable, said borebeing of a size to fit closely about the plunger I throughout the pathof travel of the joint between the head and body.

' 2. In an oil feed pump for internal comsecured to the body to resistaxial separation and freely removable therefrom by relative movementtransversely of their axis, and a cylinder casing having a bore in whichthe plunger is reciprocable, saidborebeing of a size to fit closelyabout the plunger. throughout the path of travel of the joint betweenthe head and body.

3. An oil feed pump for internal com- 'bustionengines having a plungerbody and a plunger'head' both of like diameter, one

of said members having a transversely extending tongue in its end andthe other -member having a transversely extending groove in its adjacentend fitting about the tongue in the first member, and ada ted to preventrelative axial movement't erebe' tween.

4. In an oil feed pump for internal 'combustlon englnes a casing havinan oil sup- ."ply' port, :a-cylmder sleeve fittmg said cas- .60.

".' "s1ee've h'avinga peripheral groove communimg and :removably securedtherein, said eating with said port, and ports extending from saidgroove to the central bore, and a. plun er fitting said bore of thesleeve. 5. In an oil feed pump for internal combustion engines, a casinghaving a cylindrical bore and an oil admission port, a cylinder sleevefitting said hole and provided with a peripheral groove registering withsaid port and ports connecting said groove a cylinder sleeve fitting thelarger part of said bore and'the plunger and havmg an exteriorperipheral groove and ports connecting this groove with its bore, avalve sleeve fitting the casing and holding down the cylinder sleeve, avalve in said latter sleeve and a discharge pipe communicating with thebore of the valve sleeve.

7. In an oil feed pump for internal combustion engines, a cylinder, aplunger fitting said cylinder, a sleeve fitting the cylinder and havinga valve seat within its bore, and an outwardly recessed groove justwithin the valve seat, a valve having a tubular body fitting the bore insaid sleeve and ports registering with the recessed groove of thesleeve.

'8. In an oil feed pump for internal com bustion engines, a cylinder, aplunger fitting said cylinder, asleeve fitting the cylinder 1 00 bustionengines, a plunger mechanism having two parts, one connected with theactuating means for positive movement and a spring connecting this partwith the other, and a tell-tale finger connected with oneof these partsand extending to a position'ad jacent the other part.

10. In a fuel feed pump for internal combustionengines, a plungeractuating means I20 comprising two parts connected to move together, oneof said parts being positively connected with the plunger actuatingmechanism and the other with the plunger, a-

spring forming the actuating connection between said two parts, and atell-tale finger actuated by one of said parts and having an endadjacent to the other part.

11. In afuel feeding pump for internal combustion engines, a plungeractuating -other havin a positive connection with the plunger, a oltconnecting said. parts andlimitlng their separation, a spring forming Ythe plunger driving connection 'betweensaid parts and a tell-tale fingercarried by one of said parts and extending adjacent to the other part,

12. In' a fuel feed pump for. internal combustion engines, a plungermechanism having two parts, one positlvely connected with the actuatingmeans and the other with the plunger, a spring acting .to hold apartsaid parts, and means for limiting the separation of Said parts.

Signed at Seattle, -Washington, this 25th day of June, 1918.

HENRY w. SUMNER;

